Exhaust-silencer for internal-combustion engines.



E. E. WOLF. EXHAUST SILENGER FOE INTERNAL GOMBUSTIION ENGINES.

APPLICATION FILED MAY 13, 1910.

1,0323% 1 Patentd Jul 16, 1912."

To all whom it'may concern:

FRANZ'EMIL WOLF, OF NOWAW Umm serene rnrnivr torsion.-

ES, NEAR ro'rsnarr, GERMANY.

EXHAUST-SILENCER' FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

rateneeeaeiy is, rare.

Application filed. May 13, 1910. Serial No. 561,053.

exhaust silencers for internal combustion engines and its. object is toprovide a silencer which acts without obstructing the "exhaustandreducing the efiiciency of the engines, as is the case with silencerswherein the passage is narrowed and the direction of flow of the gasesreversed. 7

With this object in View my invention consists in conducting the exhaustgases through a passage or passages formed by a series of spaced disks,arranged axially behind each other, and allowing the gases to radiallytraverse the space or spaces between said disks so that they can expandand are simultaneously subjected to friction and cooling on the surfacesof the disks. Such friction of the gases on the disksmay be produced invarious ways. For example the disks may be located in such proximity toeach other that suflicient friction is produced, or the gases may beforced to'travel on curved paths, so that they are thrown against thewalls when being. deflected.

Obviously both means may-be combined in r a single apparatus.

indicate corresponding parts.

For the purpose of explaining the invention several examples'embodyingthe same have been. shown in the accompanying drawing in which the sameletters .of reference have been used in all the views to' Insaid drawingFigure 1, is a vertical section of an exhaust-pipe and the silencerconnected therewith, Fig. 2, is across-see tion of the silencer taken onthe, line 22 of Fig. 1,Figs.' 3'to 5, are vertical sections similar tothat shown in Fig. 1 and, 1llus-" trating modifications of thesilencer,and Fig. 6, is a section of a part, of a silencer which is similar inconstruction to that shown in Fig. 5. i I

Referring to' the example illustrated 1n Figs. 1 and 2, myimprovedsilencer consists of a plurality of disks (1 placed coaxlally inseries, and provided, with the exception of the outermost one ad, withcen .tral openings 6, the diameters of which are equal to thatof theexhaust pipe 0. The first disk is jointed to the exhaust pipe 0 by meansof a union 0?; the last disk 0. forms av closure in the direction offlow of the gases. The disks are spaced apart by jspacing sleeves f,ofbolts '6, so that they inclose annular flat intermediate spaces,through which the gases flow radially outward as indicated by thearrows.' During this outward flow the gases are enabled to expand, andare at the same time cooled by contact with the disks, so that theypass. out at the periphery of the device comparatively silen ,The deviceis differentiated from previously known silencers by the fact that thereis no reduction of cross section of the pas-' sage for the exhaustgases, but a progressive increase of cross section, whereby backpressureon the power cylinders of the engine is obviated. The silencer. iscomparatively very small, and consequently of light weight,- and cheap.The subdivision of the gases prevents silencer-explosions in case offailure of ignition. The distance of the disks (1 from each other issufliciently small to produce the friction required for slowing butconnected by means down the speed of the, gases, and the diameter ofthedisks is such that thegases escape from the silencer almost noiseless.

To prevent dispersion of the exhaust gases at the periphery of thedevice, the disks a may be curved inward at their edges a as shown inFig. 3, so that the gases are deflected toward thecenter again. The ex-'haust gases may. then pass into anotherdischarge conduit. There-narrowing of the passage in this form of the device has nodisadvantageous elfects on the'working, in-

.asmuch as the gases are cooled, before they pass out of the spacesbetween the disks, and

are consequently of smaller volume.

The construction shown in Fig.3 also embodies a second means forproducing frictionof the gases on the surfaces of the disks a, thegases, being brought in close contact with the diskswhen being deflectedon the curved portion a of thes me.

7 In Fig. 4: the gas-passages are undulated, by reason of corrugation ofthe disks a a Such corrugation strengthens the disks and increases thecontact-surface for the gases,

and friction of the same on the disks. Sinuosity of the gas-passages canalso be obtained by providing the disks with ribs concentrically orotherwise disposed. Examples of this construction are shown in Figs. 5and 6, with ribs of wedge-shaped crosssection. In Fig. 5 the disks (0and a are jointed together by means of bolts 0 enabling them to beadjusted relatively to each other, to increase or reduce thegas-passages according to the power of themotor and the rate of exhaust.The same means enables the device to be easily cleaned, for whichpurpose the disks may be wholly disconnected.

In the example shown in Fig. 5, the

grooves formed between successive ribs 9 and h are rounded at theirbottoms, wlnle' in the modification shown in Fig. 6 the said grooves areformed with angular side faces.

I claim: 1. A mufiier consisting of a plurality of plates fastenedtogether in spaced relation, one of the outer plates of said mufflerbeing formed with an inlet opening for the admission of the gases andthe other of its outer plates being closed to compel the gases to flowoutwardly over and between opposed faces of the plates; eachintermediate plate being annular and havin an opening the size of whichis substantially the same as that of said inlet dpening; the intervalwhich separates the faces between which flow the gases being-at theouter edge portions of the plates at least as great as the intervalbetween the'same faces at the central portions of the plates, wherebythrottling of the gases at their discharge from the mufller is avoidedand friction is produced between the gases and the faces between whichthe gases flow; said faces being formed with a series of alternate ribsand grooves for the purpose herein set forth.

2. A muffler consisting of a plurality of plates fastened together inspaced relation; one of the outer plates of said mufiler being formedwith an inlet opening for the admission of the gases and the other ofits outer plates being closed to compel the gases to flow outwardly overand between opposed.

faces of-the plates; each intermediate plate being annular and having anopening the size of which, is substantially the same as that of saidinlet opening; the interval which separates the faces between which flowthe gases being at the outer edge portions of the plates at least asgreat as the interval between the same faces at the central port-ions ofthe plates, whereby throttling of the gases at their discharge from themuffler is avoided and friction is produced between the gases and thefaces between which the gases fiow.

In testimony whereof I afliX my signature, in presence of two witnesses.

,HENRY HAsPER,

WOLDEMAR HAUr'r.

